On causality in nonlinear vacuum electrodynamics of the Plebański class - INSPIRE

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On causality in nonlinear vacuum electrodynamics of the Plebański class

Gerold O. Schellstede
(
- Bremen U., ZARM
)
,
Volker Perlick
(
- Bremen U., ZARM
)
,
Claus Lämmerzahl
(
- Bremen U., ZARM and
- Oldenburg U.
)

Apr 9, 2016

12 pages

Published in:

Annalen Phys. 528 (2016) 9-10, 738-749

Published: Oct 1, 2016

e-Print:

1604.02545 [gr-qc]

DOI:

10.1002/andp.201600124

View in:

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Abstract: (WILEY)

We investigate the Plebański class of electrodynamical theories, i.e., theories of nonlinear vacuum electrodynamics that derive from a Lorentz-invariant Lagrangian (or Hamiltonian). In any such theory the light rays are the lightlike geodesics of two optical metrics that depend on the electromagnetic background field. A set of necessary and sufficient conditions is found whose fulfillment secures that the optical metrics are causal in the sense that the light rays are lightlike or timelike with respect to the underlying space-time metric. Thereupon we derive conditions on the Lagrangian, or the Hamiltonian, of the theory such that the causality conditions are satisfied for all allowed background fields. (The allowed values of the field strength tensor are those for which the excitation tensor is finite and real.) The general results are illustrated with several examples.

Note:

21 pages

content
electromagnetic field
nonlinear
causality

References(19)

Figures(0)

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